Dump-car.



PATBNTBD SEPT. 29,'1903.

` S. HART.

DUMP GAR.

APPLICATION Hmm SEPT. a. 1902.

3 SHEETS-S'EEET l.

N0 MODEL.

No. 739,863. PATENTED SEPT. 29, 1903.

H. S. HART.

DUMP GAR.

APPLICATION FILED SEPI'. s, 1902.

NO MODEL.

15e/.5; l Ime/mrz' Wye.;

Imm.. asuma-rou. o. c.

N0.739,8e3.' PATBN'TBD SBPT.29,V1903.

' H. s. HART.

DUMP GAR.

IIIIIIIIIIIIIIIIII PT' 8, 1902 No MODEL. a SHEETS SSSSSSS II 1A mi l g m; 7 ,2 N Y llllllllh x Imm No. 739,963. l f

UNITED STATES j Patented September 29, 1903.

PATENT OFFICE.

HARRY sTILLsON HART, on oI-IIOAGO, ILLINOIS, AssIeNoR To THE RODGER BALLAST OAR` COMPANY, -A CORPORATION OE ILLINOIS.

DUMP-OAR.

SPECIFICATION forming part of Letters Patent No. '739;863, dated September 29, 190B. y Application filed September 8, 1902- Serial No. 122,524. (No model.) v

T0 all whom, it Indy concern,.-

Beit known that I, HARRY STILLsoN HART, a citizen of the United States, residing at Chicago, in the county'of Cook and State of Illinois, have invented certain new andv useful Improvements in Dump-Cars, of which the following is a specification. My invention relates to that class of dumping-cars having a frame consisting of upright side and end portions and a rigid bottom portion and having dumping-doors arranged at the bottom thereof, such doors being provided with means for opening and closing them', means for stopping them in any desired position, and means for regulating the speed at which they are permitted to open.

It relates, further and particularly, to the means for opening and closing the dumpinging-car having a frame consisting of upright side and end portions and having arigid bottom portion, swinging dumping doors for such frame, shaft and chain mechanism for closing such doors and permitting them to open, and means for regulating the opening thereof. l

It consists, further, in a car provided with a frame having hinged dumping-doors, shaft and chain mechanism for closing such doors and permitting them to open, ratchet-wheel and winding-lever mechanism for such shafts, and detent mechanism consisting of, a friction-wheel for eachshaft, a metallic frictionstrap arranged in contact with such frictionwheel, and means for tightening and loosening such friction-strap, and thereby regulating the speedI at which Ithe dumping-door is permitted to open. f

In the accompanying drawings, Figure lis f a broken side elevation of a dumping-car constructed in accordance with my improvements; Fig. 2,'a sectional end elevation taken on line 2 of Fig. l looking in the direction of 55 'the arrow; Fig. 3, a perspective View of a corner of a car, showing the windinglever and detent mechanism; and Fig. 4, a sectional plan View of the winding-lever and de'- tent mechanism and one end of a winding- 6e shaft, taken on line 4 of Fig. 1.

In constructing a car in accordance with A' my improvements I provide a Inain frame a, consisting of side frames b, end frame c, and rigid A-shaped bottom portions d and e, rest- 6 5 ing upon longitudinal sills f, transverse sills g, tie-beams h, and t-ie-rods t'. Swinging dumping-doors j are mounted, preferably, upon the longitudinal sills f by means of hinges k and adapted to assume horizontal 7o position when closed and swing downward to permit the load to be dumped. In order to provide suitable means for closing such doors, holding them in closed position, and permitting them to open, winding-shafts Z are provided, having chains m mounted thereon and attached to the swinging sides of the dumping-doors by means of eyeboltsn and nuts o. On one end ofeach of such shafts is mounted a ratchet-wheel p, having a pawl q pivotally 8o mounted adjacent thereto, preferably upon corner-plate r'of the car, by means of a pivot is, such pawl being adapted to swing downward into contact and upward ont of contact with the ratchet-wheel. A Winding-lever t is rotatably mounted upon the shaft adjacent to the ratchet-Wheel andis provided with a pawl u, pivotal1y mounted thereon by means of a pivot o and adapted to swing into and out of contact with the teeth w of the ratchet- 9o wheel. 'v

In order to provide suitable means for regulating and controlling the speed at which the dumping-door is permitted to open, and thereby prevent such door from slamming to the detriment and injury thereof and to the injury of the car, and to effect the dumping of the load at a greater or less distance from the center of the car, las desired, a friction-Wheel 1 is mounted upon the shouldered end 2 of the Ioo shaft by means of an axial perforation 3, adapted to it upon the shouldered end of such shaft and hold the friction-wheel in positive relation thereto. A friction-strap 4 is attached at one end to the frame of the car by means of bolts 5 and is held at a suitable distance from the surface of the car by means of rests 6. This friction-strap is wound at least partially around the friction-wheel in contact therewith, and a detent-lever 7 is pivotally attached to the movable end of the strap by means of a pivot 8 and to the fixed end thereof by means of a pivot 9. This detent-lever is split at one end into two'parts 10 and 11, which straddle the respective ends of the friction-strap and assist in holding it in place in relation to the friction-wheel.

The friction-strap is made, preferably, of spring metal and is twisted near each end so that the side surfaces of the end portions extend in line with each other and are at right angles to those of the central friction portion, which contacts the friction-wheel, and the arm l2 of the detent-lever is extended beyond the movable end 0f such strap a sufficient distance to provide the desired fulcrum. By this arrangement it will be readily seen r that the closing of the door of the car may be accomplished either by throwing the pawl q into contact with the ratchet-wheel and operating winding-lever with its pawl also in contact with the ratchet-wheel or by operating the winding-lever with the pawl q out of contact with the ratchet-wheel, using the detent-lever and friction mechanism to hold the shaft during the reverse motion of the winding-lever. The door is held in closed position by throwing the pawl q into contact with the ratchet-wheel and is permitted to open by throwing such pawl out of contact therewith. The speed at which the door is permitted to open may be retarded when desired by pressure upon the detent-lever, thereby increasing the friction between the strap and friction-wheel.

The door may be stopped at any desired point by first pressing the detent-lever suciently to retard the speed of rotation of the shaft and then throwing the pawl into contact with the ratchet-wheel. The unnecessary strain upon the parts which would follow the throwing of the locking-pawl into locking position without first retarding the speed of the shaft is thus easily avoided by means of the friction-wheel and detent-lever mechanism, as is also the unnecessary strain upon the door and hinges.

I claiml. In a dumping-car, the combination of a car-frame, a dumping-door, a rotatable shaft provided with means for connecting it with the dumping-door, means for rotating the shaft, a frictionwheel mounted upon the shaft and rotatable therewith, and a frictionstrap in engagement with such friction-wheel, substantially as described.

2. In a dumping-car, the combination of a car-frame, a dumping-door, a winding-shaft provided with chain mechanism connected with the dumping-door, a ratchet-wheel mounted upon such shaft, a friction-wheel mounted upon the winding-shaft and rotatable therewith, a friction-strap arranged in contact with the friction-wheel, a detent-lever forsuch friction-strap, and a winding-lever rotatably mounted upon the windingshaft between the friction-wheel and ratchetwheel and provided with a pawl adapted to engage the ratchet-wheel, substantially as described.

3. In a dumping-car, the combination of a car-frame, a plurality of dumping-doors, a. winding-shaft for each ofsuch dumping-doors provided with chain mechanism wound thereon and connected with the dumping-doors, a-ratchet-wheel mounted upon the end of such shaft and rotatable therewith, a friction-wheel also mounted uponand rotatable with-the windingshaft, a metallic strap arranged in contact vwith the friction-wheel and wound partially around such wheel, and a detent-lever connected with such strap for operating it, substantially as described.

4. In a dumping-car, the combination of a car-frame, a pair of dumping-doors, a Winding-shaft foreach of such doors provided withchain mechanism wound upon such shaftand connected with the dumping-doors, a ratchetwheel and a friction-wheel upon one end of each shaft, a stopping-pawl mounted adjacent to and adapted to engage the ratchetwheel, a winding-lever mounted between the ratchet-wheel and friction-wheel and provided with a pawl adapted to engage the ratchetwheel, a metallic friction strap mounted upon the car-frame in contact with and wound partially around the frictionwheel, and a detent-lever pivotally connected with both ends of such friction-strap, substantially as described.

5. In a dumping-car, the combination of a car-frame, a plurality of dumping-doors, a

4winding-shaft for each dumping-door provided wth chain mechanism wound thereon and in connection with the dumping-doors, a ratchet-wheel and a friction-wheel upon such shaft, a stopping-pawl mounted upon the car-frame adjacent to and adapted toengage the ratchet-wheel, a winding-lever rotatably mounted upon the winding-shaft between the ratchet-wheel and friction-wheel provided with a pawl adapted' to engage the ratchet-wheel, a friction-strap arranged in contact with the friction-wheel and having one end attached to the car-frame, and a detent-lever pivotally mounted upon the fixed end of such friction-shaft and pivotally connected with the opposite end thereof, substantially as described.

HARRY STILLSON HART.

XVitnesses: t

A. L. SAVOIE, HARRY I. CRoMER.

IIO 

